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Honeywell DT90E1012 Digital Room Thermostat

4.2 out of 5 stars 122 customer reviews
| 25 answered questions

RRP: £43.64
Price: £28.74 & FREE Delivery in the UK. Details
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  • Slim Modern Design
  • Energy Saving TPI control
  • 4 Year Battery Life
  • Extra Large LCD
  • Volt Free Connections

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£28.74 & FREE Delivery in the UK. Details Only 11 left in stock (more on the way). Dispatched from and sold by Amazon. Gift-wrap available.

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Product Information

Technical Details
Part Number DT90E1012
Item Weight163 g
Product Dimensions9 x 2.7 x 9.2 cm
Batteries:2 AA batteries required. (included)
Item model numberDT90E1012
FinishMultiple
MaterialPlastic
Power SourceBattery-powered
Voltage24
Item Package Quantity1
Number Of Pieces1
UsageIndoor use only
Batteries Included?Yes
Batteries Required?Yes
Battery Cell TypeAlkaline
Weight165 Grams
  
Additional Information
ASINB003DTFP5A
Best Sellers Rank 13,984 in DIY & Tools (See top 100)
Shipping Weight181 g
Delivery Destinations:Visit the Delivery Destinations Help page to see where this item can be delivered.
Date First Available24 Mar. 2010
  
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Product Description

Product Description

The DT90E digital room themostat has been designed to provide automatic temperature control of gas or oil fired boiler systems, underfloor heating, electric heating and zoning systems. The DT90E has an ECO button energy saving feature which gives timed setback or boosts temperatures to reduce energy demand. This is a TPI (Time Proportional Integral) control product, which make boilers operate more efficiently and provide close accurate control.The 'OFF' setting can be used for frost or hypothermia protection, assuming the system time control is also switched on.

Box Contains

1 x DT90E1012 Stat



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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
Well made unit with clear display.
The instructions supplied in the box are the installer instructions only, which are reasonable. However if you go to Honeywell you can download three different guides, installer guide, simple guide and user guide.
To help others changing from a mechanical stat, all you need to do identify the perm live (Term A) and switched live (Term B) of your system and connect them to A and B terminals. If you have a neutral at your stat, just park it and make safe in an insulated connection block or terminal. DO NOT park it on terminal C! (This is Normally Closed Termination A to C).
In operation has a nice clean click when calling for heat, but not to loud.
This is a good upgrade from a mechanical stat.
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Brought this as was trying to upgrade my old mechanical thermostat, first I tried a heatmisser ds1-l which was rubbish , Have to say the honeywell is fantastic , it regulates the temperature very well. and cuts in and out well..Now the bad part....oh my god what a loud click it makes , and the even worse part even when the heating is off it still clicks on and off and in the night as you can imagine its 10 times louder...To sum it up if you are going to place this well away from any rooms that you spend time in or you have a well sound proofed house then this will work , if not You will never get to sleep with the constant clicking on and off all night.
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Works functionally very well but is FAR TOO LOUD when clicking on and off. Can be heard in any room of house when kicks in. Considering replacing just because of this issue. Afraid is a deal breaker so 1 star only.
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Verified Purchase
Replaced the old Honeywell dial type thermostat for this one and now I wish I had done it a lot sooner.
Simple diy fitting. Remember to turn power off at mains. Took all of 10 minutes. Luckily I had the old one powered by the 2 simple cables as well, 1 Red 1 Black. Straight swap and now the house feels so much better. Before it was either always too hot or too cold. Now it's just right.
Looks smart and easy to operate, all at such a reasonable price.
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I bought this thermostat because I trusted the brand name and wanted something sleek and low profile.

It is good but it makes, what I consider to be an awfully loud noise when it clicks on (and off). To give you an idea of how loud it is, we can hear it click from any room in our house, even with the internal doors closed. If you're a light sleeper - it will wake you up if it comes on at night. I did email Honeywell support about this thinking it could just be a faulty unit, however after some further research it turns out that this is how it was designed - I never heard back from Honeywell support either.

One other point to consider, this is branded as an Eco device which to a certain extent it is. The issue i have is that this is a manual setting, not an automatic one. So unless you want to be 'interactive' with this unit I'd suggest not paying the premium. Furthermore it does require batteries, if the batteries run out whilst you're away the unit will not work; although this is true for any of the LCD type thermostats.

I'm going to buy a plain 'ole simple unit that does not make a loud click and requires no batteries. They are much cheaper and more reliable. I think it's only fair not to buy a Honeywell unit either - I like to know that if I encounter a problem; there is technical support available.

Of course, if you really do want to buy this unit; I'd recommend a set of Ear plugs too. :)
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Verified Purchase
A very simple and yet very versatile piece of equipment. I'm a bit dubious that the supplied AA batteries will last the 2 to 4 years the manual says they will but we shall see. The uses for this must be absolutely incredible with it having a simple 2 wire setup that can switch a good range of currents. I had this setup on my boiler as 24v DC but then installed new equipment and it moved over to the 230v AC system without even having to touch the thermostat or change any settings. Absolutely beautiful.
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Verified Purchase
Maybe I got a dodgy unit but I had to return this. Going from a 4 wire to 2 wire system, I abandoned the neutral and the earth and connected the live and call for heat wire. All that happened was that my heating was stuck on permanently. I had to remove it and put the old thermostat back. When it was connected I noticed the inside temperature display was incredibly inaccurate. It just displayed 23 degrees when the room was both hot and cold. Think it went up to 23.5 when I was so hot I thought I was going to melt!
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Verified Purchase
I've replaced an old and inefficient mechanical stat with this digital unit and the early impressions are very good.
Easy enough to install, the unit is standard size so easy to replace an existing. The stat simply wires in line with the live, providing a switched live return to timeswitch, so only a two wire installation (if earth and neutral exist in current stat, insulate them and tuck out the way). Included instructions are basic and mainly pictorial, but can be understood if user competent (if in doubt, get help).
The stat itself provides a good number of options in a hidden menu to set-up, although all the defaults work ok 'out the box'. You can set maximum temperature for example, ECO temp etc.
The stat is a doddle to operate, simply needing a press of either the up/down keys to adjust the target temperature required, and the display will show a flame symbol to illustrate if the heating is on, plus current room temperature.
ECO function works well too. The single ECO button is pressed to select a predefined temperature (which you can set to suit) and ECO then runs until turned off. Alternatively you have the option to use the up/down keys to set a timed range between one and 24 hours for ECO to run. So if set to 5hrs for example, ECO will automatically switch off after five hours and the stat will return to work as normal again.
This stat certainly controls the heating more efficiently that a mechanical device, as the switching threshold is far more accurate. The mechanical stats rely on the heating and cooling of a bi-met strip and suffer quite a lag in switching. Our heating has clearly run more consistently with this new digital thermostat.
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